CN205792313U - A kind of control circuit of auto-induction voltage-reduced starting - Google Patents
A kind of control circuit of auto-induction voltage-reduced starting Download PDFInfo
- Publication number
- CN205792313U CN205792313U CN201620533860.6U CN201620533860U CN205792313U CN 205792313 U CN205792313 U CN 205792313U CN 201620533860 U CN201620533860 U CN 201620533860U CN 205792313 U CN205792313 U CN 205792313U
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- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims 1
- 239000003054 catalyst Substances 0.000 abstract 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
This utility model relates to the control circuit of a kind of auto-induction voltage-reduced starting, belongs to reduced voltage starting control field.Described control circuit, including catalyst KM1, KM2, KM3, auxiliary reclay KA1, KA2, KA3, time relay KT1, starting button SB1, SB2, permutator HK, and stop button SB3, described catalyst and described auxiliary reclay have multiple normally opened contact and normally-closed contact respectively.This utility model manually starting button and the auxiliary reclay composition relay latching circuit being different from automatic control system, realize manual control system relatively independent with automatic control system, in control circuit, increase warning circuit and the alert circuit of examination simultaneously, whether operator are only reported to the police by alarm device i.e. can determine whether motor whether normal starting, and then determine reliable manual starting opportunity, also allow for finding out fault generation point simultaneously, can confirm that warning circuit is the most normal by the alert circuit of examination.
Description
Technical Field
The utility model belongs to step-down start control field, concretely relates to control circuit that self coupling step-down starts.
Background
The motor is started by adopting an auto-transformer step-down starting mode, the auto-transformer is started by a control circuit to reduce the starting voltage applied to the stator winding of the motor, and after the motor is started, the motor is separated from the auto-transformer, so that the motor can normally work under full voltage. The self-coupling voltage reduction starting has automatic control and manual control modes, when the automatic starting fails or the circuit is overhauled, the automatic starting needs to be switched to manual starting, the automatic control and the manual control are generally realized through an intermediate relay, when the intermediate relay fails, the automatic control cannot be started, even if the intermediate relay is switched to the manual control, the starting cannot be completed, meanwhile, an alarm circuit is not arranged in a control circuit, the motor cannot be normally started due to the failure of any electric element in the circuit, an operator cannot timely and correctly find a failure occurrence point due to the fact that the motor is not normally started or not, and the potential risk factor is unfavorable for production.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention is directed to overcome the deficiencies in the prior art, and to provide a low-cost, convenient and practical control circuit for self-coupling voltage-reducing start.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a self-coupling voltage reduction starting control circuit comprises contactors KM1, KM2, KM3, intermediate relays KA1, KA2 and KA3, a time relay KT1, starting buttons SB1 and SB2, a change-over switch HK and a stop button SB3, wherein the contactors and the intermediate relays are respectively provided with a plurality of normally open contacts and normally closed contacts;
wherein,
the control circuit is provided with a first node and a second node;
a first normally open contact of the contactor KM2 and the coil of the time relay KT1 form a series circuit and are connected to the first node and the second node;
the first normally closed contact of the intermediate relay KA1 is respectively connected to the first node and one end contact of the transfer switch HK, the other end of the transfer switch HK is provided with a manual end and an automatic end contact, and the normally open contact of the time relay KT1, the coil of the intermediate relay KA2 and the first normally open contact form a relay self-locking circuit which is connected to the automatic end contact and the second node;
The stop button SB3 and the intermediate relay KA1 coil are connected in series line to the first node and the second node;
the second normally closed contact of the intermediate relay KA1, the first normally closed contact of the contactor KM3, the starting button SB1, the first normally closed contacts of the intermediate relays KA2 and KA3, and the coil of the contactor KM1 are sequentially connected in series to form a line connected to the first node and the second node; a third node and a fourth node are respectively arranged between the starting button SB1 and the first normally closed contact of the contactor KM3 and the first normally closed contact of the intermediate relay KA2, one ends of the second normally open contact of the contactor KM2 and the first normally open contact of the contactor KM1 are respectively connected to the third node and the fourth node, the other ends of the second normally open contact of the contactor KM2 and the first normally open contact of the contactor KM1 are both connected to one end of the coil of the contactor KM2, and the other end of the coil of the contactor KM2 is connected to the second node;
the starting button SB2, a coil of the intermediate relay KA3 and a first normally open contact form a relay self-locking circuit which is connected to a manual end contact and the second node;
After being connected in parallel, the second normally-open contacts of the intermediate relays KA2 and KA3, the first normally-closed contacts of the contactor KM1 and the coil of the contactor KM3 form a series circuit and are connected to the first node and the second node.
Further, control circuit still includes time relay KT2 and alarm device HA, time relay KT2 coil both ends are parallelly connected extremely time relay KT1 coil both ends, contactor KM3 second normally closed contact time relay KT2 normally open contact with alarm device HA constitutes series connection line and is connected to first node with the second node, time relay KT2 time delay time sets for being greater than time relay KT1 time delay time.
Further, the alarm device HA includes one or more of an electric bell, an electric whistle and an alarm lamp.
Further, the control circuit also comprises a test bell button SB4, and the test bell button SB4 is connected in parallel at two ends of a series circuit formed by the second normally closed contact of the contactor KM3 and the normally open contact of the time relay KT 2.
Furthermore, the control circuit further comprises indicator lamps HW, HY and HG, and the indicator lamps HW, HY and HG are respectively connected in series with the second normally open contact of the contactor KM1, the third normally open contact of the contactor KM2 and the first normally open contact of the contactor KM3 in a one-to-one correspondence manner to form a parallel line connected to the first node and the second node.
Further, the control circuit further comprises a breaker QF and a thermal relay KH, the second node is connected to one end of the thermal relay KH, and the other end of the first node and the other end of the thermal relay KH are respectively connected to one end of the breaker QF.
The utility model adopts the above technical scheme, possess following beneficial effect at least:
the utility model discloses a control circuit that auto coupling step-down starts increases an auxiliary relay that is different from on the automatic control circuit and constitutes relay self-locking circuit on manual starting circuit, realizes that manual control and automatic control are independent control separately, like this when automatic control's auxiliary relay trouble can not realize automatic control and start, can not influence and switch to manual control starter motor; meanwhile, an alarm circuit is added, so that switching failure caused by the fault of an electrical element in the circuit can be found in time, after an operator hears alarm sound, the operator can determine whether the fault is relieved or not by manual operation according to whether the alarm sound is relieved or not, and whether the normal alarm system is normal or not at ordinary times is confirmed by adding the alarm test circuit.
Drawings
FIG. 1 is a diagram of a main circuit of the self-coupled buck starter of the present invention;
fig. 2 is a control circuit diagram of the self-coupling voltage-reducing start of the present invention.
In the figure: 1. a first node; 2. a second node; 3. a third node; 4. and a fourth node.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Fig. 1 is the utility model discloses a main circuit that auto voltage reduction started, wherein circuit breaker QM, contactor KM3 and thermal relay KH establish ties in proper order and constitute the circuit, and contactor KM2 is connected to circuit breaker QM and auto transformer TA's high-voltage side respectively, and contactor KM1 one end short circuit, the other end is connected to auto transformer TA's neutral point end, and auto transformer TA's taking a percentage and thermal relay KH are connected to the motor respectively.
Fig. 2 is a control circuit of the self-coupling voltage-reducing start of the present invention, which includes contactors KM1, KM2, KM3, relays KA1, KA2, KA3, a time relay KT1, start buttons SB1, SB2, a change-over switch HK, and a stop button SB3, wherein the contactors and the relays have a plurality of normally open contacts and normally closed contacts, respectively;
wherein,
the control circuit is provided with a first node 1 and a second node 2;
a first normally open contact of the contactor KM2 and the coil of the time relay KT1 form a series circuit and are connected to the first node 1 and the second node 2;
The first normally closed contact of the intermediate relay KA1 is respectively connected to the first node 1 and one end contact of the transfer switch HK, the other end of the transfer switch HK is provided with a manual end and an automatic end contact, and the normally open contact of the time relay KT1, the coil of the intermediate relay KA2 and the first normally open contact form a relay self-locking circuit which is connected to the automatic end contact and the second node 2;
the stop button SB3 and the intermediate relay KA1 coil are connected in series line to the first node 1 and the second node 2;
the second normally closed contact of the intermediate relay KA1, the first normally closed contact of the contactor KM3, the starting button SB1, the first normally closed contacts of the intermediate relays KA2 and KA3, and the coil of the contactor KM1 are sequentially connected in series to form a circuit connected to the first node 1 and the second node 2; a third node 3 and a fourth node 4 are respectively arranged between the starting button SB1 and the first normally closed contact of the contactor KM3 and the first normally closed contact of the intermediate relay KA2, one ends of the second normally open contact of the contactor KM2 and the first normally open contact of the contactor KM1 are respectively connected to the third node 3 and the fourth node 3, the other ends of the second normally open contact of the contactor KM2 and the first normally open contact of the contactor KM1 are both connected to one end of a coil of the contactor KM2, and the other end of the coil of the contactor KM2 is connected to the second node 2;
The starting button SB2, a coil of the intermediate relay KA3 and a first normally open contact form a relay self-locking circuit which is connected to a manual end contact and the second node 2;
after being connected in parallel, the second normally open contacts of the intermediate relays KA2 and KA3, the first normally closed contact of the contactor KM1 and the coil of the contactor KM3 form a series circuit and are connected to the first node 1 and the second node 2.
According to the scheme, the relay self-locking circuit is formed by adding the intermediate relay KA3 and the starting button SB2, meanwhile, the second normally open contacts of the intermediate relays KA2 and KA3 are connected in parallel and then form a series circuit with the first normally closed contact of the contactor KM1 and the coil of the contactor KM3, so that independent control of manual control and automatic control can be achieved, and switching to a manual control starting motor cannot be affected when the automatic control intermediate relay KA2 fails to achieve automatic control starting.
As a further improvement, control circuit still includes time relay KT2 and alarm device HA, time relay KT2 coil both ends are parallelly connected extremely time relay KT1 coil both ends, contactor KM3 second normally closed contact time relay KT2 normally open contact with alarm device HA constitutes series circuit and is connected to first node 1 with second node 2, time relay KT2 delay time is set for and is greater than time relay KT1 delay time.
Further, the alarm device HA includes one or more of an electric bell, an electric whistle and an alarm lamp.
According to the scheme, when a normally open contact of the time relay KT1 cannot be closed in the automatic starting circuit, a coil of the time relay KT2 is electrified, the normally open contact of the time relay KT2 is closed, the alarm device HA gives an alarm, an alarm mode combining sound and light can be adopted, an operator can clearly know that the motor cannot be normally started after hearing or seeing an alarm prompt, at the moment, the change-over switch HK is switched to manual control, the manual starting is carried out by pressing the starting button SB2, whether the fault is relieved or not can be determined according to the fact that the alarm sound is relieved, and meanwhile, the fault of an electrical element in the circuit can be found and searched in time easily.
Further, the control circuit also comprises a test bell button SB4, and the test bell button SB4 is connected in parallel at two ends of a series circuit formed by the second normally closed contact of the contactor KM3 and the normally open contact of the time relay KT 2. This confirms that the alarm system is in a normal state by pressing the test bell button SB 4.
Furthermore, the control circuit further comprises indicator lamps HW, HY and HG, and the indicator lamps HW, HY and HG are respectively connected in series with the second normally open contact of the contactor KM1, the third normally open contact of the contactor KM2 and the first normally open contact of the contactor KM3 in a one-to-one correspondence manner to form a parallel line connected to the first node and the second node. Through increasing work pilot lamp, operating personnel can confirm easily whether normal in the switching of contactor in the circuit, and operating personnel notifies the maintenance personal with the state of each pilot lamp when breaking down, and maintenance personal can have a preliminary judgement to the trouble before driving away the scene, can direct analysis go out the trouble reason even, take the instrument and the electrical component that will change, in time solve the problem.
Further, the control circuit further comprises a breaker QF and a thermal relay KH, the second node is connected to one end of the thermal relay KH, and the other end of the first node and the other end of the thermal relay KH are respectively connected to one end of the breaker QF.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.
Claims (6)
1. A self-coupling voltage reduction starting control circuit comprises contactors KM1, KM2, KM3, intermediate relays KA1, KA2 and KA3, a time relay KT1, starting buttons SB1 and SB2, a change-over switch HK and a stop button SB3, wherein the contactors and the intermediate relays are respectively provided with a plurality of normally open contacts and normally closed contacts;
wherein,
the control circuit is provided with a first node and a second node;
a first normally open contact of the contactor KM2 and the coil of the time relay KT1 form a series circuit and are connected to the first node and the second node;
the first normally closed contact of the intermediate relay KA1 is respectively connected to the first node and one end contact of the transfer switch HK, the other end of the transfer switch HK is provided with a manual end and an automatic end contact, and the normally open contact of the time relay KT1, the coil of the intermediate relay KA2 and the first normally open contact form a relay self-locking circuit which is connected to the automatic end contact and the second node;
the stop button SB3 and the intermediate relay KA1 coil are connected in series line to the first node and the second node;
the method is characterized in that:
the second normally closed contact of the intermediate relay KA1, the first normally closed contact of the contactor KM3, the starting button SB1, the first normally closed contacts of the intermediate relays KA2 and KA3, and the coil of the contactor KM1 are sequentially connected in series to form a line connected to the first node and the second node; a third node and a fourth node are respectively arranged between the starting button SB1 and the first normally closed contact of the contactor KM3 and the first normally closed contact of the intermediate relay KA2, one ends of the second normally open contact of the contactor KM2 and the first normally open contact of the contactor KM1 are respectively connected to the third node and the fourth node, the other ends of the second normally open contact of the contactor KM2 and the first normally open contact of the contactor KM1 are both connected to one end of the coil of the contactor KM2, and the other end of the coil of the contactor KM2 is connected to the second node;
The starting button SB2, a coil of the intermediate relay KA3 and a first normally open contact form a relay self-locking circuit which is connected to a manual end contact and the second node;
after being connected in parallel, the second normally-open contacts of the intermediate relays KA2 and KA3, the first normally-closed contacts of the contactor KM1 and the coil of the contactor KM3 form a series circuit and are connected to the first node and the second node.
2. The control circuit of claim 1, wherein: control circuit still includes time relay KT2 and alarm device HA, time relay KT2 coil both ends are parallelly connected extremely time relay KT1 coil both ends, contactor KM3 second normally closed contact time relay KT2 normally open contact with alarm device HA constitutes series circuit and is connected to first node with the second node, time relay KT2 time delay time sets for and is greater than time relay KT1 time delay.
3. The control circuit of claim 2, wherein: the alarm device HA includes one or more of an electric bell, a siren and an alarm lamp.
4. The control circuit of claim 1, wherein: the control circuit further comprises a test bell button SB4, and the test bell button SB4 is connected in parallel at two ends of a series circuit formed by the second normally closed contact of the contactor KM3 and the normally open contact of the time relay KT 2.
5. The control circuit of claim 1, wherein: the control circuit further comprises indicator lamps HW, HY and HG, wherein the indicator lamps HW, HY and HG are respectively connected with the second normally open contact of the contactor KM1, the third normally open contact of the contactor KM2 and the first normally open contact of the contactor KM3 in series in a one-to-one correspondence mode to form a parallel line, and the parallel line is connected to the first node and the second node.
6. The control circuit of claim 1, wherein: the control circuit further comprises a breaker QF and a thermal relay KH, the second node is connected to one end of the thermal relay KH, and the other end of the first node is connected to one end of the breaker QF respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620533860.6U CN205792313U (en) | 2016-06-02 | 2016-06-02 | A kind of control circuit of auto-induction voltage-reduced starting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620533860.6U CN205792313U (en) | 2016-06-02 | 2016-06-02 | A kind of control circuit of auto-induction voltage-reduced starting |
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| Publication Number | Publication Date |
|---|---|
| CN205792313U true CN205792313U (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620533860.6U Expired - Fee Related CN205792313U (en) | 2016-06-02 | 2016-06-02 | A kind of control circuit of auto-induction voltage-reduced starting |
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| CN (1) | CN205792313U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107065825A (en) * | 2017-03-08 | 2017-08-18 | 大同煤矿集团有限责任公司 | Electric control system failure tester |
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2016
- 2016-06-02 CN CN201620533860.6U patent/CN205792313U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107065825A (en) * | 2017-03-08 | 2017-08-18 | 大同煤矿集团有限责任公司 | Electric control system failure tester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 Termination date: 20210602 |